Spraying gets decent bonding to non dirty casting which I’m assuming the drum is
Spray welding a brake drum is a known process
Just no one does it anymore
There were some restoration shops that did super rare drums for 1910s20s era vehicles
I’m just thinking about how to do it for cheap at home
The bond doesn’t need to be super great
The material added is under shear, the original drum will take the hoop stress.
Anyway I’m not gonna be messing with this process until I’ve exhausted all machine shops in my neck of the woods
Fitting a liner is also an option but machining that is a big delicate project too
-Stan
